Optimization of the Preparation of Mercaptoacetyl Chitosan and its Flocculating Performance

Abstract:

The optimum preparation conditions of the macromolecule flocculant-mercapto-acetyl chitosan (MAC) using orthogonal experiment were investigated, and its performances were tested by using the wastewater containing turbidity and/or heavy mental ions such as copper, cadmium, mercury, nickel ions as the target in different pH value in detail. The experimental results show that: (1)The optimal preparation conditions of MAC are as follows:the mass ratio of m (chitosan):m (mercaptoacetic acid) is 1:1, pH value is 5.0, and the reaction time is 3.5 h. (2)The selectivity order of different heavy metal ions by MAC is Cd2+>Cu2+>Ni2+ for the same experimental conditions. (3)With the increasing in pH value the removal efficiency of Cu2+ by MAC was enhanced. (4) The removal efficiencies of heavy mental ions were greatly promoted by the cooperation effects for the water sample containing turbidity causing substances.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1901-1907
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1901
• Online since: August 2013
• Authors: Cui Ling Zhang, Ming Yue Zhang, Qing Chang
• Keywords: Chitosan, Flocculation, Heavy Metal, Macromolecule Heavy Metal Flocculant, Mercaptoacetic Acid, Turbidity

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